package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnum;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegisterVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone){

        //TODO 1,接口防刷

        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone);
        if (!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000){
                return R.error(BizCodeEnum.SMS_CODE_EXCEPTION.getCode(),BizCodeEnum.SMS_CODE_EXCEPTION.getMsg());
            }
        }


        //2，验证码的再次校验。redis  key:phone -> value:code
        String code = UUID.randomUUID().toString().substring(0, 5);
        String substring = code+"_"+System.currentTimeMillis();
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,substring,10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone,code);
        return R.ok();
    }

    @PostMapping("/register")
    public String register(@Valid UserRegisterVo vo, BindingResult result, RedirectAttributes redirectAttributes){

        if (result.hasErrors()){

            Map<String,String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(
                    FieldError::getField,FieldError::getDefaultMessage));

            //model.addAttribute("errors",errors);
            redirectAttributes.addFlashAttribute("error",errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }
        //真正注册，调用远程服务
        String code = vo.getCode();

        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)){
            if (code.equals(s.split("_")[0])){
                //删除验证码，令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //远程调用
                R r = memberFeignService.register(vo);
                if (r.getCode()==0){
                    //成功
                    return "redirect:/login.html";
                }else {
                    HashMap<String, String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);

                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            }else {
                HashMap<String, String> errors = new HashMap<>();
                errors.put(code,"验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else {
            HashMap<String, String> errors = new HashMap<>();
            errors.put(code,"验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }

    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null){
            //没登录
            return "login";
        }else {
            return "redirect:http://gulimall.com";
        }

    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session){

        //远程登录
        R login = memberFeignService.login(vo);
        if (login.getCode()==0){

            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
            });
            //成功放到session
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimall.com";
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",login.getData(new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }


    }

}
